کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4993822 | 1458024 | 2018 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Experimental study on mixed convection in an asymmetrically heated, inclined, narrow, rectangular channel
ترجمه فارسی عنوان
مطالعه تجربی بر روی مخلوط مخلوط در کانال نامتقارن گرم، مایل، باریک، مستطیل شکل
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کلمات کلیدی
مخلوط مخلوط، تجسم جریان، بی ثباتی حرارتی، کانال مستطیلی باریک، گرایش گردش طبیعی،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
چکیده انگلیسی
Experimental study on mixed convection in the entrance region of a one-side-heated narrow rectangular channel has been carried out. We have performed a series of experiments under natural circulation conditions with Re ranging from 1000 to 3000 and inclination angle ranging from 0° to 30°. Meanwhile, we conducted flow visualization experiments to identify secondary flow driven by temperature difference between the lower, heated and upper, unheated plate of the channel. It is found that thermal instability can be enhanced by increasing the inclination angle of the channel. The secondary flow induces the onset of thermal instability (OTI) while increasing in Re delays the OTI. A sudden increase of hear transfer coefficient and friction factor has been observed after the OTI. The traditional identification criteria for mixed convection are not suitable for the inclined, narrow rectangular channel with a heated lower side. However, transverse Richardson number can identify mixed convection in the channel. The experiment results, together with image data for the flow condition in the inclined narrow rectangular channel, offer valuable data to improve the engineering design of plate-type fuel assembly and similar heat exchangers.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 116, January 2018, Pages 1074-1084
Journal: International Journal of Heat and Mass Transfer - Volume 116, January 2018, Pages 1074-1084
نویسندگان
Chunping Tian, Jianjun Wang, Xiaxin Cao, Changqi Yan, A. Ayodeji Ala,